Reichl H, Balen A, Jansen CA (October 2002). "Prion transmission in blood and urine: what are the implications for recombinant and urinary-derived gonadotrophins?". Human Reproduction. 17 (10): 2501–2508. doi:10.1093/humrep/17.10.2501. PMID12351519.
Reichl H, Balen A, Jansen CA (October 2002). "Prion transmission in blood and urine: what are the implications for recombinant and urinary-derived gonadotrophins?". Human Reproduction. 17 (10): 2501–2508. doi:10.1093/humrep/17.10.2501. PMID12351519.